content/blimp: Set up hooks for enabling LTHRemote in the renderer.

blimp/engine/renderer/scheduler_client.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BLIMP_ENGINE_RENDERER_SCHEDULER_CLIENT_H_
+#define BLIMP_ENGINE_RENDERER_SCHEDULER_CLIENT_H_
+
+#include "base/macros.h"
+
+namespace blimp {
+namespace engine {
+
+class SchedulerClient {
+ public:
+  virtual ~SchedulerClient() {}
+
+  virtual void StartMainFrameUpdate() = 0;
+};
+
+}  // namespace engine
+}  // namespace blimp
+
+#endif  // BLIMP_ENGINE_RENDERER_SCHEDULER_CLIENT_H_